Re: [boost] [typeof] Weird VC++ compiler bug

Subject: Re: [boost] [typeof] Weird VC++ compiler bug
From: Edward Diener (eldiener_at_[hidden])
Date: 2015-05-23 09:45:05

On 5/23/2015 8:12 AM, Rob Stewart wrote:
> On May 22, 2015 2:57:26 PM EDT, Edward Diener <eldiener_at_[hidden]> wrote:
>> On 5/22/2015 11:24 AM, Steven Watanabe wrote:
>>> AMDG
>>>
>>> On 05/22/2015 08:02 AM, Edward Diener wrote:
>>>> I discovered a strange VC++ bug using Boost.typeof. I am not
>> posting
>>>> this to rag VC++ but wondering if there is some known workaround in
>>>> Boost or in Boost.config.
>>>>
>>>
>>> The workaround for most weird Boost.Typeof errors
>>> is BOOST_TYPEOF_NESTED_TYPEDEF_TPL.
>>
>> Thanks !
>>
>> I saw that macro and saw the mention in the doc of "deconfusing
>> several
>> compilers (notably VC7.1 and VC8.0) on the way", and could not get it
>> into my head that this could still be a problem with VC12. Of course I
>> should have tried it.
>>
>> Oh Microsoft ! What's a little bug that you refuse to fix for at least
>> a decade and counting.
>
> Isn't the problem the lack of two-phase lookup in that compiler?

Considering that in my example which fails the class template never gets 
instantiated it does not seem that the lack of two-phase lookup should 
cause such an error. But whatever... Microsoft has a well-known system 
in place by which they decide that known bugs should not be fixed if 
they don't think it is important enough to do so.